**Pilish is an extraordinary form of constrained writing that straddles the boundary between language and mathematics. Pilish literature is written in such a way that the number of letters in each successive word is equal to the successive decimal places of pi, 3.14159265359…**

**The first few numbers of pi can be memorized using the mnemonic “How I wish I could calculate pi,” while extra decimal places can be added by memorizing ever longer sentences (“How I want a drink, alcoholic of course, after the heavy lectures involving quantum mechanics” takes pi to its 14th decimal place). **

**However, as a form of constrained writing, Pilish was taken to an extreme by the American mathematician Mike Keith in his 1996 short story ***Cadaeic Cadenza*, which comprises 3835 words all following the decimal sequence of pi (0s are words 10 letters long).

**As if that weren’t mindboggling enough, in 2010 Keith published the novella ***Not A Wake *which pushed that total to 10,000. Check it out here.

*Related*